CN218468821U - LNG low temperature immersed pump test platform - Google Patents
LNG low temperature immersed pump test platform Download PDFInfo
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- CN218468821U CN218468821U CN202222894837.8U CN202222894837U CN218468821U CN 218468821 U CN218468821 U CN 218468821U CN 202222894837 U CN202222894837 U CN 202222894837U CN 218468821 U CN218468821 U CN 218468821U
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Abstract
The utility model belongs to the technical field of LNG immersed pump tests, and particularly discloses an LNG low-temperature immersed pump test platform, which comprises a storage tank, a pump pool, an immersed pump, a liquid inlet pipe, a gas return pipe, a liquid outlet pipe and a liquid return pipeline; the liquid inlet pipe is respectively communicated with the storage tank and the pump pool, and a liquid inlet pipe valve system is arranged on the liquid inlet pipe to control the connection and disconnection of the liquid inlet pipe and collect test data of the liquid inlet pipe; the air return pipe is respectively communicated with the storage tank and the pump pool, and an air return pipe valve system is arranged on the air return pipe and used for controlling the on-off of the air return pipe and collecting test data of the air return pipe; the liquid outlet pipe is respectively connected with the pump pool and the liquid supply equipment outside the pump pool, a liquid outlet pipe valve system is arranged on the liquid outlet pipe to control the on-off of the liquid outlet pipe and collect test data of the liquid outlet pipe, and a liquid return pipeline safety valve and a liquid return pipeline stop valve are arranged on the liquid return pipeline. By adopting the technical scheme, the LNG immersed pump test is carried out, enough experimental data are obtained, the pressure of the pipe liquid loop is adjusted, the manpower is reduced, and more accurate data are obtained.
Description
Technical Field
The utility model belongs to the technical field of the LNG immersed pump is experimental, a LNG low temperature immersed pump test platform is related to.
Background
LNG (Liquefied Natural Gas) immersed pumps are pump equipment for delivering ultra-low temperature Liquefied Natural Gas, and when the pump works, the whole pump body is immersed in the Liquefied LNG, and a centrifugal impeller is driven by a built-in motor to rotate at high speed to deliver the LNG from a storage tank.
Due to the ultralow temperature and the volatile, flammable and explosive characteristics of the LNG medium, the LNG immersed pump needs to be wholly immersed in the closed LNG storage cabin when working, and the cable is connected into a motor inside the LNG immersed pump from the outside through a special sealing structure, so that power is provided for the operation of the LNG immersed pump. During the operation of the LNG immersed pump, the LNG immersed pump is required to be capable of resisting an ultralow temperature environment of about 162 ℃ below zero of an LNG medium, and all parts need to be sealed extremely reliably, so that the danger of explosion caused by LNG overflow is prevented. The special use environment and working condition provide extremely high requirements for the design and manufacture of the LNG immersed pump, and in order to ensure that main performance parameters, stability and safety of the pump meet the requirements, each pump needs to simulate practical application working conditions in a professional test device after being manufactured to perform performance tests, and verify the working performance, safety performance, stability and the like of the pump.
The existing LNG immersed pump test platform is single in function, has limitation on performance test of the LNG immersed pump, lacks of measuring and monitoring instruments for noise, vibration, pump pool liquid level height and system integral input (output) flow, and cannot obtain enough test data to comprehensively judge the performance of the LNG immersed pump. The existing test bed is manually controlled to control the valve during testing, the obtained data are asynchronous, and the timeliness is not strong. The storage tank and the pump pool are directly connected, so that the effective cavitation allowance (liquid level height difference between the storage tank and the pump pool) of the system is not convenient to adjust, and meanwhile, the pipeline laying of the test platform is not concise and neat and is easy to distinguish, and the function is not complete.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a LNG cryogenic pump test platform device to solve the problem that test bench test capability is not enough.
In order to achieve the above object, the basic scheme of the utility model is: an LNG low-temperature immersed pump test platform comprises a storage tank, a pump pool, an immersed pump hermetically installed in the pump pool, a liquid inlet pipe, a gas return pipe, a liquid outlet pipe and a liquid return pipeline;
one end of the liquid inlet pipe is communicated with a liquid outlet of the storage tank, the other end of the liquid inlet pipe is communicated with a liquid inlet of the pump pool, and a liquid inlet pipe valve system is arranged on the liquid inlet pipe and used for controlling the on-off of the liquid inlet pipe and collecting temperature and pressure test data in the liquid inlet pipe;
one end of the air return pipe is connected with an air return port of the storage tank, the other end of the air return pipe is communicated with an air receiving port of the pump pool, and an air return pipe valve system is arranged on the air return pipe and used for controlling the on-off of the air return pipe and collecting temperature and pressure test data in the air return pipe;
one end of the liquid outlet pipe is communicated with a liquid outlet of the pump pool, the other end of the liquid outlet pipe is connected with liquid supply equipment outside the pump pool, and a liquid outlet pipe valve system is arranged on the liquid outlet pipe and used for controlling the on-off of the liquid outlet pipe and collecting temperature and pressure test data in the liquid outlet pipe;
one end of the liquid return pipeline is communicated with the pipe body, the liquid outlet pipe is arranged outside the pump pool, the other end of the liquid return pipeline is communicated with the liquid return port of the storage tank, and the communication position of the liquid return pipeline and the liquid outlet pipe is located on one side, away from the pump pool, of the liquid outlet pipe valve control system arranged on the liquid outlet pipe.
The operating principle and the beneficial effects of the basic scheme are as follows: the liquid inlet pipe valve system, the gas return pipe valve system and the liquid outlet pipe valve system are utilized to obtain summary test data in corresponding pipelines, so that whether the performance of the pump reaches the standard or not is conveniently measured, and the working efficiency of testing each pump is increased. The device simulates the working condition of the LNG immersed pump in actual work, the whole LNG immersed pump is sealed in a pump pool and immersed in a test medium, the performance of the test pump in actual operation can be evaluated to the maximum extent, and the working performance, safety performance and stability of the test pump can be verified.
Further, the liquid inlet pipe valve system comprises a liquid inlet pipe safety valve, a liquid inlet pipe low-temperature needle valve, a liquid inlet pipe pressure gauge, a liquid inlet pipe pressure sensor, a liquid inlet pipe stop valve and a liquid inlet pipe temperature transmitter which are sequentially arranged from the storage tank side to the pump pool side;
the liquid inlet pipe pressure sensor collects a pressure signal in the liquid inlet pipe and transmits the pressure signal to the liquid inlet pipe pressure gauge, and the liquid inlet pipe pressure signal is displayed through the liquid inlet pipe pressure gauge;
the liquid inlet pipe temperature transmitter is used for acquiring a temperature signal of a medium in the liquid inlet pipe.
The liquid inlet pipe safety valve prevents the pipeline between the storage tank and the pump pool from being suppressed, and the low-temperature needle valve can close the valve when the pressure gauge needs to be disassembled for inspection. The liquid inlet pipe stop valve is manually controlled, the liquid inlet size can be adjusted, and the liquid supply is closed. The liquid inlet pipe pressure sensor and the liquid inlet pipe temperature transmitter monitor temperature and pressure signals in real time, and the pressure signals are displayed on a liquid inlet pipe pressure gauge, so that the display is more visual.
Further, two first auxiliary stop valves are arranged on the liquid inlet pipe safety valve.
The pipeline can be closed when the safety valve needs to be checked and replaced by arranging the first auxiliary stop valve, the safety valve is convenient to detach, and the safety valve cannot be involved under special working conditions.
Further, the air return pipe valve system comprises an air return pipe temperature transmitter, an air return pipe stop valve, an air return pipe low-temperature needle valve, an air return pipe pressure gauge and an air return pipe pressure sensor which are sequentially arranged from the storage tank side to the pump pool side;
the air return pipe temperature transmitter acquires a temperature signal of a medium in the air return pipe;
the air return pipe pressure sensor collects a pressure signal in the air return pipe and transmits the pressure signal to the air return pipe pressure gauge, and the air return pipe pressure gauge displays the pressure signal in the air return pipe.
The air return pipe temperature transmitter and the air return pipe pressure sensor monitor temperature and pressure signals in real time, and the pressure signals are displayed on the air return pipe pressure gauge, so that the display is more visual.
Further, the liquid outlet pipe valve system comprises a liquid outlet pipe check valve, a first liquid outlet pipe safety valve, a liquid outlet pipe low-temperature needle valve, a liquid outlet pipe pressure gauge, a liquid outlet pipe pressure sensor, a liquid outlet pipe flowmeter, a liquid outlet pipe stop valve, a second liquid outlet pipe safety valve and a liquid outlet pipe electric regulating valve which are sequentially arranged from one side close to the pump pool;
the liquid outlet pipe check valve is used for preventing liquid from flowing back, the liquid outlet pipe pressure sensor is used for collecting pressure signals in the liquid outlet pipe and transmitting the pressure signals to the liquid outlet pipe pressure gauge, and the liquid outlet pipe pressure gauge is used for displaying the pressure signals in the liquid outlet pipe;
the liquid outlet pipe flowmeter is used for collecting flow signals of media in the liquid outlet pipe.
The drain pipe check valve is used for preventing liquid from flowing backwards, and the first drain pipe safety valve can prevent the pipeline pressure from exceeding the upper limit. The drain pipe stop valve can manually close the pipeline, and the second drain pipe safety valve prevents the pipeline between stop valve and the electrical control valve from being suppressed. The electric regulating valve of the liquid outlet pipe can utilize a circuit to carry out automatic opening and closing control, and the automatic flow control is realized. An electric control valve is additionally arranged behind the flowmeter to adjust the pressure of a pipe liquid loop, so that the manpower is reduced, and more accurate data is obtained. The liquid outlet pipe pressure sensor and the liquid outlet pipe flowmeter acquire pressure and flow signals in real time, and the pressure signals are displayed on the gas return pipe pressure meter, so that the display is more visual.
Furthermore, two secondary stop valves of the second type are arranged on the first liquid outlet pipe safety valve, and a third secondary stop valve is arranged on the second liquid outlet pipe safety valve.
Set up the stop valve, can close the pipeline when corresponding the relief valve censorship, the relief valve of being convenient for is dismantled, and special operating mode can not let the relief valve intervene.
Further, return and be provided with two liquid return pipeline relief valves and a liquid return pipeline stop valve on the liquid return pipeline, the liquid return pipeline stop valve is located between two liquid return pipeline relief valves, is equipped with a fourth pair of stop valve on the liquid return pipeline relief valve that is close to drain pipe one side, is provided with two fifth pair of stop valves on the liquid return pipeline relief valve that is close to storage tank one side.
The liquid return pipeline safety valve prevents the pipeline which can generate a closed section from suppressing pressure, and the liquid return pipeline stop valve can manually control the opening of the valve when the simulated working condition of the gas dispenser is considered. When the stop valve is connected with the working condition of the gas dispenser after the simulation is considered, the opening of the valve can be manually controlled.
Further, a pump pool cover is arranged at the top of the pump pool, at least 4 openings are formed in the pump pool cover, and a pump pool safety valve, a pump pool pressure gauge port, a pump pool drain outlet, a pump pool junction box port and a pump pool temperature transmitter are respectively arranged at the openings;
a capacitance type liquid level meter is arranged on the inner wall of the pump pool and used for monitoring the liquid level height in the pump pool, and a vibration meter is arranged on the outer wall of the pump pool and used for monitoring a vibration signal of the outer wall of the pump pool when the immersed pump runs;
still include display module, the signal output part of feed liquor pipe pressure sensor, feed liquor pipe temperature transmitter, muffler pressure sensor, drain pipe flowmeter, drain pipe pressure sensor, capacitanc level gauge and vibration meter all is connected with display module, display module installs outside the PLC switch board in the studio.
The pump pool safety valve is used for releasing pressure when the pressure in the pump pool is too high, and the pressure gauge is connected to the port of the pump pool pressure gauge to monitor the pressure in the pump pool in real time. The pump pool drain outlet is connected with a drain pipe in the pool, the port of the pump pool junction box is a reserved port for motor wiring, and the pump pool temperature transmitter is used for monitoring the temperature of the pump pool. The capacitance type liquid level meter can monitor the liquid level height in the pump pool at any time. And the vibration meter is used for monitoring and recording the vibration condition of the outer wall of the pump pool when the LNG immersed pump operates in real time. Pressure signal, temperature signal, flow signal, liquid level signal etc. all show through display module, and are more directly perceived and accurate.
Furthermore, the liquid inlet pipe and the air return pipe are both flexible pipes.
The shape of the hose can be changed, the hose is manually moved to be positioned again, the height adjustment is realized, and the cavitation allowance requirements of different LNG immersed pumps are met.
Furthermore, the liquid inlet pipe is set to DN80, and the liquid outlet pipe is set to DN50.
The caliber of the pipeline is adjusted, the liquid inlet capacity is improved, and the performance of the submersible pump is better tested.
Drawings
FIG. 1 is a schematic structural diagram of an LNG low-temperature immersed pump test platform of the utility model;
figure 2 is the utility model discloses LNG low temperature immersed pump test platform's pump pond's schematic structure drawing.
Reference numerals in the drawings of the specification include: the device comprises a storage tank 1, a pump pool 2, a submerged pump 3, a liquid inlet pipe 4, a liquid outlet pipe 5, a gas return pipe 6, a liquid return pipeline 7, a first auxiliary stop valve 8, a liquid inlet pipe safety valve 9, a liquid inlet pipe low-temperature needle valve 10, a liquid inlet pipe pressure gauge 11, a liquid inlet pipe pressure sensor 12, a liquid inlet pipe stop valve 13, a liquid inlet pipe temperature transmitter 14, a liquid outlet pipe check valve 15, a second auxiliary stop valve 16, a first liquid outlet pipe safety valve 17, a liquid outlet pipe low-temperature needle valve 18, a liquid outlet pipe pressure gauge 19, a liquid outlet pipe pressure sensor 20, a liquid outlet pipe flowmeter 21, a liquid outlet pipe stop valve 22, a third auxiliary stop valve 23, a second liquid outlet pipe safety valve 24, a liquid outlet pipe electric regulating valve 25, a fourth auxiliary stop valve 26, a first liquid return pipeline safety valve 27, a liquid return pipeline stop valve 28, a fifth auxiliary stop valve 29, a second liquid return pipeline safety valve 30, a gas return pipe temperature transmitter 31, a gas return pipe stop valve 32, a gas return pipe low-temperature needle valve 33, a gas return pipe pressure gauge 34, a gas return pipe pressure sensor 35, a pump pool wiring box port a, a pump pool b, a pump pool safety valve, a pump pool drain port d.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The utility model discloses a LNG low temperature immersed pump test platform, as shown in figure 1 and figure 2, including storage tank 1, pump pond 2, the immersed pump 3 of seal installation in pump pond 2, feed liquor pipe 4, muffler 6, drain pipe 5 to and return liquid pipeline 7. The pressure sensors used in the present solution are preferably, but not limited to, 26PC01 SMT, ZCH304, etc., and the temperature transmitters are preferably, but not limited to, SBWR, SBWZ series thermocouples, thermal resistance temperature transmitters, etc.
One end of the liquid inlet pipe 4 is communicated with the liquid outlet of the storage tank 1, and the other end is communicated with the liquid inlet of the pump pool 2. The liquid inlet pipe 4 is provided with a valve system of the liquid inlet pipe 4 and used for controlling the on-off of the liquid inlet pipe 4 and collecting temperature and pressure test data in the liquid inlet pipe 4. Preferably, the liquid inlet pipe 4 valve system comprises a liquid inlet pipe safety valve 9 (which can adopt DN15, PN40, setting pressure 1.26Mpa, shanghai Baitu DA22F series), a liquid inlet pipe low-temperature needle valve (which adopts DN6, PN40, shanghai Baitu DX series), a liquid inlet pipe pressure gauge 11 (such as 0-2.5MPa, precision grade 2.5, radial type, dial diameter phi 100/tin-free Kaifeng YN100 BF), a liquid inlet pipe pressure sensor 12 (such as 0-2.5MPa, precision grade 0.25/Sendai CY-YL series), a liquid inlet pipe stop valve 13 (such as DN80, PN40, shanghai Baitu DJ series) and a liquid inlet pipe temperature transmitter 14 (such as measuring range-200 ℃ -100 ℃/Chengdai CY-WZ series) which are sequentially arranged from the storage tank 1 side to the pump pool 2 side.
The liquid inlet pipe pressure sensor 12 and the liquid inlet pipe temperature transmitter 14 may be welded or bonded to the inner wall of the liquid inlet pipe 4, and the liquid inlet pipe pressure gauge 11 is fixedly mounted (e.g., welded, bonded, riveted, etc.) to the outer wall of the liquid inlet pipe 4. The liquid inlet pipe pressure sensor 12 collects a pressure signal in the liquid inlet pipe 4 and transmits the pressure signal to the liquid inlet pipe pressure gauge 11, and the pressure signal of the liquid inlet pipe 4 is displayed through the liquid inlet pipe pressure gauge 11. The liquid inlet pipe temperature transmitter 14 is used for collecting temperature signals of media in the liquid inlet pipe 4. The liquid inlet pipe safety valve 9 prevents the pressure building of the pipeline between the storage tank 1 and the pump pool 2, and the low-temperature needle valve can close the valve when the pressure gauge needs to be disassembled for inspection. The liquid inlet pipe stop valve 13 is manually controlled, the size of liquid inlet can be adjusted, and liquid supply can be closed. The liquid inlet pipe pressure sensor 12 and the liquid inlet pipe temperature transmitter 14 monitor temperature and pressure signals in real time, and display the pressure signals on the liquid inlet pipe pressure gauge 11, so that the display is more visual.
More preferably, the liquid inlet pipe safety valve 9 is provided with two first auxiliary stop valves 8 (DN 15, PN40, shanghai Baitu DJ series, etc. can be adopted). Set up first auxiliary stop valve 8 and can close the pipeline when the relief valve needs the censorship to be changed, the relief valve of being convenient for is dismantled, and can not let the relief valve intervene at special operating mode.
One end of the air return pipe 6 is communicated with an air return port of the storage tank 1, and the other end is communicated with an air receiving port of the pump pool 2. And a valve system of the air return pipe 6 is arranged on the air return pipe 6 and used for controlling the on-off of the air return pipe 6 and acquiring temperature and pressure test data in the air return pipe 6. The air return pipe 6 valve system comprises an air return pipe temperature transmitter 31 (such as measuring range-200-100 ℃/Pacheng CY-WZ series), an air return pipe stop valve 32 (such as DN50, PN40, DJ series/Shanghai Baitu series), an air return pipe low-temperature needle valve 33 (adopting DN6, PN40, shanghai Baitu DX series), an air return pipe pressure gauge 34 (such as 0-2.5MPa, precision grade 2.5, radial type, dial diameter phi 100/tin-free Kaifeng YN100 BF) and an air return pipe pressure sensor 35 (such as 0-2.5MPa, precision grade 0.25/Pacheng CY-YL series), wherein the air return pipe temperature transmitter 31 and the air return pipe pressure sensor 35 can be welded or bonded on the inner wall of the liquid inlet pipe 4, and the air return pipe pressure gauge 34 is fixedly installed (such as welding, bonding or riveting) on the outer wall of the liquid inlet pipe 4. The muffler temperature transmitter 31 collects a temperature signal of a medium in the muffler 6, the muffler pressure sensor 35 collects a pressure signal in the muffler 6 and transmits the pressure signal to the muffler pressure gauge 34, and the muffler pressure gauge 34 displays the pressure signal in the muffler 6.
More preferably, the gas return pipe 6 and the liquid inlet pipe 4 are hoses (such as soft rubber pipes), the shape of the hoses can be changed, the hoses can be manually moved to be repositioned, the height adjustment is realized, and the cavitation allowance requirements of different LNG immersed pumps 3 are met. The height difference of the connecting pipelines of the storage tank 1 and the pump pool 2 can not be adjusted, the situation that the cavitation allowance is not enough occurs in the actual process, the pump can not normally output liquid, the use of a client is influenced, certain economic loss is caused, the height can be adjusted by connecting the hose, and the problem of the cavitation allowance of the immersed pump 3 is effectively solved. Can become the sled with whole test platform device, the modularization management is removing and is moving very convenient to test bench area is little, easily installation. When testing pumps with different flow rates, the replaceable pump pool 2 changes the volume, and the subsequent pipeline does not need to be changed.
One end of the liquid outlet pipe 5 is communicated with a liquid outlet of the pump pool 2, and the other end of the liquid outlet pipe is connected with a liquid supply device outside the pump pool 2. And a liquid outlet pipe 5 valve system is arranged on the liquid outlet pipe 5 and used for controlling the on-off of the liquid outlet pipe 5 and collecting temperature and pressure test data in the liquid outlet pipe 5. Preferably, the drain pipe 5 valve system comprises a drain pipe check valve 15 (such as DN50, PN63, DH-50/Shanghai Baitu), a first drain pipe safety valve 17 (such as DN15, PN40, setting pressure 1.26MPa, shanghai Baitu DA22F series), a drain pipe low-temperature needle valve 18 (such as DN6, PN40, shanghai Baitu DX series), a drain pipe pressure gauge 19 (such as 0-2.5MPa, precision grade 2.5, radial type, dial diameter phi 100/tin-free Kaifeng YN100 BF), a drain pipe pressure sensor 20 (such as 0-6.3MPa, precision 0.25 grade, CY-YL series/Shanghai Baitu), a drain pipe flow meter 21 (such as CMF200H/B, CY-YL series/Shanghai Baitu Dian), a drain pipe flow meter 21 (such as CMF200H/B, phi 800L/mi/Emerson), a flow meter and the like), a drain pipe 22 (such as DN50, PN63, german series/Shanghai Baitu Dian, germany, series/Shanghai Baitu Dia, a safety valve 24, such as DSF 4, setting valve 15, DSKA 4, and electric shutoff valve (such as SLKA, 15-25 DW, 15-25 DW series).
Drain pipe check valve 15 is used for preventing the liquid backward flow, and first drain pipe relief valve 17 can avoid pipeline pressure to exceed the upper limit, and drain pipe stop valve 22 can manually close the pipeline, and second drain pipe relief valve 24 prevents that the pipeline is suppressed between stop valve and the electrical control valve and presses. The liquid outlet pipe pressure sensor 20 can be welded on the inner wall of the liquid outlet pipe 5, the liquid outlet pipe pressure sensor 20 collects pressure signals in the liquid outlet pipe 5 and transmits the pressure signals to the liquid outlet pipe pressure gauge 19, and the liquid outlet pipe pressure gauge 19 is used for displaying the pressure signals in the liquid outlet pipe 5. The drain pipe flowmeter 21 is used for collecting flow signals of media in the drain pipe 5. The electric control valve 25 of the second liquid outlet pipe can be automatically opened and closed by using a circuit, so that the flow can be automatically controlled. All be manual control valve during current test bench test, the data that obtain are asynchronous, and the ageing is not strong, installs an electrical control valve additional behind the present flowmeter, adjusts the pressure in pipe liquid return circuit, reduces the manpower and obtains more accurate data. The liquid outlet pipe pressure sensor 20 and the liquid outlet pipe flowmeter 21 acquire pressure and flow signals in real time, and the pressure signals are displayed on the air return pipe pressure gauge 34, so that the display is more visual.
More preferably, the first liquid outlet safety valve 17 is provided with two second auxiliary stop valves 16 (such as DN15, PN63, DJ series/shanghai hundred drawings), and the second liquid outlet safety valve 24 is provided with a third auxiliary stop valve 23. Set up the stop valve, can close the pipeline when corresponding the relief valve censorship, the relief valve of being convenient for is dismantled, and special operating mode can not let the relief valve intervene.
One end of the liquid return pipeline 7 is communicated with the pipe body of the liquid outlet pipe 5 arranged outside the pump pool 2, and the other end is communicated with the liquid return port of the storage tank 1. The communicating part of the liquid return pipeline 7 and the liquid outlet pipe 5 is positioned at one side of a liquid outlet pipe 5 valve control system arranged on the liquid outlet pipe 5, which is far away from the pump pool 2, and two liquid return pipeline safety valves (which can adopt DN15, PN40, setting pressure 1.26Mpa, shanghai Baitu DA22F series) and a liquid return pipeline stop valve 28 (such as DN80, PN40, shanghai Baitu DJ series) are arranged on the liquid return pipeline 7. The liquid return pipeline stop valve 28 is located between the two liquid return pipeline safety valves, and the liquid return pipeline safety valve close to the liquid outlet pipe 5 is a first liquid return pipeline safety valve 27, and a fourth auxiliary stop valve 26 is arranged on the first liquid return pipeline safety valve. The liquid return line safety valve close to the side of the storage tank 1 is a second liquid return line safety valve 30, and two fifth auxiliary stop valves 29 are arranged on the second liquid return line safety valve.
The liquid return pipeline safety valve prevents the pipeline which can generate a closed section from building up pressure, and the liquid return pipeline stop valve 28 can manually control the opening of the valve when the working condition of the gas dispenser is considered after simulation. When the stop valve is connected with the working condition of the gas dispenser after the simulation is considered, the opening of the valve can be manually controlled. Preferably, the liquid inlet pipe 4 is set to DN80, and the liquid outlet pipe 5 is set to DN50. The caliber of the pipeline is adjusted, the caliber of the liquid inlet pipe 4 is enlarged, the liquid inlet capacity is improved, and the performance of the immersed pump 3 is better tested
The utility model discloses an among the preferred scheme, 2 tops in pump pond are equipped with 2 covers in pump pond, and 2 covers in pump pond are provided with 4 at least openings, and the opening part sets up pump pond relief valve, pump pond manometer mouth c respectively, and the drain (connect interior blow off pipe) d of pond, pump pond terminal box mouth an and pump pond temperature transmitter b.
And a capacitive liquid level meter (which can adopt UYB-P02GPP3ZD, chuan instrument and the like) is arranged on the inner wall of the pump pool 2, and can be fixedly arranged on the inner wall of the pump pool 2 in a welding, bonding or embedding way and used for monitoring the liquid level height in the pump pool 2. The vibration meter (UT 311/Ullidard and the like can be adopted) is installed on the outer wall of the pump pool 2 and is used for monitoring the vibration signal of the outer wall of the pump pool 2 when the immersed pump 3 runs, the vibration meter is connected to the surface of the immersed pump 3 and is used for detecting the vibration condition of the immersed pump 3 in real time, and the vibration size of the LNG immersed pump 3 takes the data as reference. One noise meter is respectively arranged at one meter on the X, Y and Z axes of the pump pool 2 to measure the noise change during operation under different powers.
LNG low temperature immersed pump 3 test platform still includes display module, display module can adopt the display screen, a display and so on, feed liquor pipe pressure sensor 12, feed liquor pipe temperature transmitter 14, muffler temperature transmitter 31, muffler pressure sensor 35, drain pipe flowmeter 21, drain pipe pressure sensor 20, the signal output part of capacitive level gauge and vibration meter passes through wireless transmission module (like the bluetooth, zigbee, wi Fi etc. wireless transmission equipment) and display module electric connection, display module installs (like the welding, the riveting, the joint etc.) outside the PLC switch board in the studio.
The safety valve of the pump pool 2 releases pressure when the pressure in the pump pool 2 is too high, the pressure gauge port of the pump pool 2 is connected with a pressure gauge, and the pressure in the pump pool 2 is monitored in real time. The 2 drain outlets of the pump pond are connected with a drain pipe in the pond, the 2 junction box port of the pump pond is a reserved port for wiring of a motor, and the 2 temperature transmitter of the pump pond carries out the temperature monitoring of the pump pond 2. The capacitance type liquid level meter can monitor the liquid level height in the pump pool 2 at any time. Vibration meter real-time supervision record LNG immersed pump 3 is the vibration condition of 2 outer walls of pump ponds when the operation. Pressure signal, temperature signal, flow signal, liquid level signal etc. all show through display module, and are more directly perceived and accurate. The test medium of this device LNG immersed pump 3 during capability test can recycle through circulation liquid supply system, reduces experimental cost. The complete machine simulation field working condition test of the LNG immersed pump 3 can be carried out, and the obtained data is more referential to field operation. The test platform can reserve connecting pipelines of the gas dispenser and the reciprocating pump on the basis of testing the function of the immersed pump 3 so as to test the performance of the gas dispenser and the reciprocating pump.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An LNG low-temperature immersed pump test platform is characterized by comprising a storage tank, a pump pool, an immersed pump hermetically installed in the pump pool, a liquid inlet pipe, a gas return pipe, a liquid outlet pipe and a liquid return pipeline;
one end of the liquid inlet pipe is communicated with a liquid outlet of the storage tank, the other end of the liquid inlet pipe is communicated with a liquid inlet of the pump pool, and a liquid inlet pipe valve system is arranged on the liquid inlet pipe and used for controlling the on-off of the liquid inlet pipe and collecting temperature and pressure test data in the liquid inlet pipe;
one end of the air return pipe is connected with an air return port of the storage tank, the other end of the air return pipe is communicated with an air receiving port of the pump pool, and an air return pipe valve system is arranged on the air return pipe and used for controlling the on-off of the air return pipe and collecting temperature and pressure test data in the air return pipe;
one end of the liquid outlet pipe is communicated with a liquid outlet of the pump pool, the other end of the liquid outlet pipe is connected with liquid supply equipment outside the pump pool, and a liquid outlet pipe valve system is arranged on the liquid outlet pipe and used for controlling the on-off of the liquid outlet pipe and collecting temperature and pressure test data in the liquid outlet pipe;
one end of the liquid return pipeline is communicated with the liquid outlet pipe arranged outside the pump pool, the other end of the liquid return pipeline is communicated with a liquid return port of the storage tank, and the communicated position of the liquid return pipeline and the liquid outlet pipe is positioned on one side, away from the pump pool, of a liquid outlet pipe valve control system arranged on the liquid outlet pipe.
2. The LNG low temperature immersed pump test platform of claim 1, wherein the liquid inlet pipe valve system comprises a liquid inlet pipe safety valve, a liquid inlet pipe low temperature needle valve, a liquid inlet pipe pressure gauge, a liquid inlet pipe pressure sensor, a liquid inlet pipe stop valve, and a liquid inlet pipe temperature transmitter arranged in sequence from a storage tank side to a pump sump side;
the liquid inlet pipe pressure sensor acquires a pressure signal in the liquid inlet pipe and transmits the pressure signal to the liquid inlet pipe pressure gauge, and the liquid inlet pipe pressure signal is displayed through the liquid inlet pipe pressure gauge;
the liquid inlet pipe temperature transmitter is used for acquiring a temperature signal of a medium in the liquid inlet pipe.
3. The LNG cryogenic immersed pump test platform of claim 2, wherein the liquid inlet pipe safety valve is provided with two first sub-stop valves.
4. The LNG low temperature immersed pump test platform of claim 1, wherein the return pipe valve system comprises a return pipe temperature transmitter, a return pipe stop valve, a return pipe low temperature needle valve, a return pipe pressure gauge and a return pipe pressure sensor, which are sequentially arranged from the storage tank side to the pump sump side;
the air return pipe temperature transmitter acquires a temperature signal of a medium in the air return pipe;
the pressure sensor of the return air pipe collects pressure signals in the return air pipe and transmits the pressure signals to the pressure gauge of the return air pipe, and the pressure gauge of the return air pipe displays the pressure signals in the return air pipe.
5. The LNG cryogenic submersible pump test platform of claim 1, wherein the drain valve system comprises a drain check valve, a first drain safety valve, a drain cryogenic needle valve, a drain pressure gauge, a drain pressure sensor, a drain flow meter, a drain stop valve, a second drain safety valve, and a drain electrical control valve disposed in that order from a side adjacent to the pump sump; the liquid outlet pipe check valve is used for preventing liquid from flowing back, the liquid outlet pipe pressure sensor is used for collecting a pressure signal in the liquid outlet pipe and transmitting the pressure signal to the liquid outlet pipe pressure gauge, and the liquid outlet pipe pressure gauge is used for displaying the pressure signal in the liquid outlet pipe;
the liquid outlet pipe flowmeter is used for collecting flow signals of media in the liquid outlet pipe.
6. The LNG cryogenic submersible pump test platform of claim 5, wherein the first liquid outlet pipe safety valve is provided with two second secondary stop valves, and the second liquid outlet pipe safety valve is provided with a third secondary stop valve.
7. The LNG cryogenic immersed pump test platform of claim 1, wherein the liquid return line is provided with two liquid return line safety valves and a liquid return line stop valve, the liquid return line stop valve is located between the two liquid return line safety valves, the liquid return line safety valve near the liquid outlet is provided with a fourth auxiliary stop valve, and the liquid return line safety valve near the storage tank is provided with two fifth auxiliary stop valves.
8. The LNG low-temperature immersed pump test platform as claimed in claim 1, wherein a pump sump cover is arranged on the top of the pump sump, the pump sump cover is provided with at least 4 openings, and a pump sump safety valve, a pump sump pressure gauge port, a pump sump drain port, a pump sump junction box port and a pump sump temperature transmitter are respectively arranged at the openings;
a capacitance type liquid level meter is arranged on the inner wall of the pump pool and used for monitoring the liquid level height in the pump pool, and a vibration meter is arranged on the outer wall of the pump pool and used for monitoring a vibration signal of the outer wall of the pump pool when the immersed pump runs;
still include display module, the signal output part of feed liquor pipe pressure sensor, feed liquor pipe temperature transmitter, muffler pressure sensor, drain pipe flowmeter, drain pipe pressure sensor, capacitanc level gauge and vibration meter all is connected with display module, display module installs outside the PLC switch board in the studio.
9. The LNG cryogenic submersible pump test platform of claim 1, wherein the liquid inlet pipe and the gas return pipe are both flexible pipes.
10. The LNG cryogenic submersible pump test platform of claim 1, wherein the liquid inlet pipe is DN80 and the liquid outlet pipe is DN50.
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| CN202222894837.8U CN218468821U (en) | 2022-11-01 | 2022-11-01 | LNG low temperature immersed pump test platform |
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| CN202222894837.8U CN218468821U (en) | 2022-11-01 | 2022-11-01 | LNG low temperature immersed pump test platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117662508A (en) * | 2023-12-22 | 2024-03-08 | 杭州杭氧工装泵阀有限公司 | Low-temperature test device and method for liquid hydrogen centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117662508A (en) * | 2023-12-22 | 2024-03-08 | 杭州杭氧工装泵阀有限公司 | Low-temperature test device and method for liquid hydrogen centrifugal pump |
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